SSC CGL 20221)The width of the path around a square field is 4.5 m and its area is 105.75 m2. Find the cost of fencing the field at the rate of Rs. 100 per meter.
Rs. 550
SSC CGL 20222)The length and the breadth of a rectangle are made to increase and decrease, respectively, by 8% and 10%. What is the percentage increase or decrease in its area?
Decrease by 2.8%
SSC CGL 20223)If the length of a diagonal of a square is (a + b), then the area of the square is:
\(\frac{1}{2}\left( {{{\rm{a}}^2} + {{\rm{b}}^2}} \right) + {\rm{ab}}\)
SSC CGL 20224)What will be the total cost (in Rs.) of polishing the curved surface of a wooden cylinder at rate of Rs. 50 per m2, if its diameter is 70 cm and height is 6 m? (Take π = \(\frac{22}{7}\) )
660
SSC CGL 20225)The area of a carboard (in cm2) needed to make a closed box of size 20 cm × 10 cm × 8 cm will be:
880
SSC CGL 20226)The inner circumference of a circular path enclosed between two concentric circles is 264 m. The uniform width of the circular path is 3 m. What is the area (in m2, to the nearest whole number) of the path? (Take \(\pi=\frac{22}{7} \) )
820
SSC CGL 20227)The sides of a triangular field are 360 m, 480 m and 600 m. Its area is equal to the area of a square field. What is the side (in m) of the square field?
\(120 \sqrt{6}\)
SSC CGL 20228)A 22.5 m high tent is in the shape of a frustum of a cone surmounted by a hemisphere. If the diameters of the upper and the lower circular ends of the frustum are 21 m and 39 m, respectively, then find the area of the cloth (in m2) used to make the tent (ignoring the wastage).
(Use \(π = \frac{{22}}{7}\))
\(2107 \frac{{2}}{7}\)
SSC CGL 20229)The perimeters of two similar ΔABC and ΔPQR are 48.4 cm and 12.1 cm, respectively. What is the ratio of the areas of ΔABC and ΔPQR?
16 ∶ 1
SSC CGL 202210)How many spherical lead shots each of diameter 8.4 cm can be obtained from a rectangular solid of lead with dimension 88 cm, 63 cm, 42 cm,\((take \pi= \frac{22}{7} ) \)?
750